Does anybody know how I can double the "one quart per 1000 sq ft" on PermaGreen units? 2 pumps? Eliminate the 2nd hoses? Motorcycle battery? I test drove a new Magnum, but saw the same thing....."spits" of herbicide that missed concrete areas the size of a nickle. My LESCO guy watched and agreed, cuz there's NO WAY small-leafed weeds could die. We have experienced this for too many years now. The Magnum has not solved this problem either >> same o same o. There's gotta be a better way??? I like the Ultras very much. rscvp, cuz any tips are appreciated. Thanks. p.s. I tried searching this site, but found nothing regarding this?? We also have two units tied up in repair shops who are trying to solves this problem. I'm trying every which way, so please do not scold me for not being able to find a previous post, cuz I can't find any.